Sebastian "Zebbosai" Olsson is a former competitive TF2 player who last played for Reason Gaming as both Soldier and Scout. Zebbosai first came to prominence after winning Division 1 with broder in ETF2L Season 10. He then continued to be a part of several successful teams, the most notable being broder and TCM-Gaming.

Zebbosai retired from TF2 in early 2016 and is currently playing high-level Overwatch with his team Misfits, now Overwatch League team Florida Mayhem.